Package for mineral wool products, modules to form such package and process to manufacture such a package

ABSTRACT

A package ( 10 ) comprises a multitude of rolls ( 1   a,    1   b,    1   c,    1   d,    2   a,    2   b,    2   c,    2   d ) or packages of panels ( 22   a,    22   b,    22   c,    22   d,    22   e,    22   f,    22   g,    22   h ) of mineral wool, especially fibre glass insulating material, wherein each roll ( 1   a,    1   b,    1   c,    1   d,    2   a,    2   b,    2   c,    2   d ) or package of panels ( 22   a,    22   b,    22   c,    22   d,    22   e,    22   f,    22   g,    22   h ) is held in a compressed state and a plurality of rolls ( 1   a,    1   b,    1   c,    1   d,    2   a,    2   b,    2   c,    2   d ) or packages of panels ( 22   a,    22   b,    22   c,    22   d,    22   e,    22   f,    22   g,    22   h ) are grouped into one module ( 6 ), respectively and a plurality of modules ( 6   a,    6   b, c ) are arranged on a support surface ( 9 ) of the package ( 10 ), the modules ( 6; 6   a,    6   b,    6   c ) being in a compressed state and packed in a wrapping ( 3 ) of plastic film. The package is characterized in that each module ( 6; 6   a,    6   b,    6   c ) is formed by at least two rows ( 13 ) of rolls ( 1   a,    1   b   , 1   c,    1   d,    2   a,    2   b,    2   c,    2   d ) or packages of panels ( 22   a,    22   b,    22   c,    22   d,    22   e,    22   f,    22   g,    22   h ), at least two such rows ( 13 ) being arranged on top of each other and the modules ( 6   a,    6   b,    6   c ) being arranged next to each other on the support surface ( 8 ) and being held together on the support surface ( 8 ), preferably packed in a further plastic film wrapping ( 9 ).

FIELD OF THE INVENTION

The invention relates to a package comprising a multitude of rolls orpanels of mineral wool, especially fibre glass insulating material withthe pre-characterizing features of claim 1. The invention furtherrelates to a packaged module with the pre-characterizing features ofclaim 15 and a process to manufacture such a package.

PRIOR ART

Mineral wool products used for insulating purposes have a relatively lowdensity. This is the reason why such products generate relatively hightransport costs per weight unit. Therefore, attempts have been made topackage mineral wool products such that the existing volume withintrucks or other means of transport can be used in an optimum way.

This leads to the formation of big packages combining a multitude ofrolls or panels of mineral wool, which are packaged in such a way as tohandle together larger units.

Further, attempts have been made to form packages of mineral woolproducts in such a way as to compress the products. However, whencompressing mineral wool products, care has to be taken not to damagethe products. Thus, any compression has to be made such that theindividual products can be transported in a compressed state but, on theconstruction side, spring back again to their original size and densityonce they have been released from their package.

EP 0 220 980 B1 describes a package comprising a multitude of rollswhere each individual roll of fibre glass is compressed during windingup the product to a roll and followed by a second compression step whena plurality of rolls is packed together as to form a so-called module.Then, a plurality of modules are stacked in two layers on top of eachother to form a package which is finally wrapped in a plastic film. Byusing such two individual compression steps, high overall compressionrates can be achieved. However, additional equipment is needed to formthe individual modules and to stack the modules on top of each other ona suitable standing area like a pallet.

EP 1 321 382 A discloses a package comprising a plurality of coiledrolls of mineral wool. The mineral wool rolls are arranged on a supportsurface in parallel rows consisting in each case of a plurality ofrolls. Both the individual rolls and the rows of rolls are packed in aplastic film wrapping in a compressed state, wherein the individuallypacked rows of rolls are compressed in the longitudinal direction. Inthe package, at least two layers of rows of rolls are arranged on top ofeach other and packed in a further plastic film wrapping. EP 1 321 382 Arepresents the closest prior art.

DISCLOSURE OF THE INVENTION

It is the object of the invention to suggest a package comprising amultitude of rolls or panels of mineral wool which can be formed with ahigh throughput and with good aesthetics.

This object is solved by a package with the features of claim 1 or apackaged module with the features of claim 15. The process tomanufacture such a package is given in claim 17.

In the inventive package comprising a multitude of rolls or panelspackets of mineral wool and especially fibre glass insulating material,each roll or panel package is held in a compressed state. A plurality ofrolls or panel packages are grouped into one module, respectively, and aplurality of modules are arranged on a support surface of the package.The modules are in a compressed state and packed in a wrapping ofplastic film. The package is characterized in that each module is formedby at least two rows of rolls or packages of panels, at least two suchrows being arranged on top of each other such that the rolls touch oneanother at one of their front surfaces. The modules being arranged nextto each other on the support surface are packed by a palletizer in afurther plastic film wrapping or by strap retainers. In other words,each module is formed such that at least two rows of rolls or packagesof panels are arranged on top of each other. This allows the use of apacking machine having a double capacity as compared to the prior art asdescribed. Same applies for a palletizer, which also has a doublecapacity and therefore, can be operated using half cycles, because it isno longer necessary to stack a plurality of modules on top of eachother. The modules now being formed by at least two rows of rolls orpackages of panels arranged on top of each other make it no longernecessary to form separate layers of modules within the package. Besidesthe possibility to operate the packing machine and the palletizer withdouble capacity, the aesthetics of the package can be improved because,within each module, a highly accurate alignment of the rows of rolls orpackages of panels being arranged on top of each other can be achieved.

Depending of whether the modules are completely closed by a plastic filmso as to protect them against the ingress of water, the final packagingof the package can either be strap retainers in case the modules arecompletely closed, or a plastic film wrapping in order to protect thewhole package against the undesired ingress of water.

The inventive packaged module for a multitude of rolls or packages ofpanels of mineral wool, especially fibre glass insulating material,comprises compressed rolls of mineral wool which are individuallypackaged within a plastic film or, alternatively, compressed stacks ofmineral wool panels which are packaged in a plastic film to from apackage of panels. The packaged module is formed by at least two rows ofrolls or packages of panels, wherein at least two such rows are arrangedon top of each other such that the rolls touch one another at one oftheir front surfaces, and surrounded by a further plastic film.Additionally, the rows of rolls or packages of panels are furthercompressed within the packaged module. In other words, the overallcompression takes place in two distinct steps, a first compression ofthe rolls or the stacks of panels before surrounding them by a plasticfilm, and a second compression of the rows of rolls or packages beforethe modules formed are also packaged by a further plastic film.

The process to manufacture such a package is characterized in that themodules are formed by arranging at least two rows of rolls or packagesof panels next to each other, compressing this arrangement and wrappinga plastic film around the at least two rows of rolls or packages ofpanels.

This makes it possible to manufacture the individual rows of rolls orpackages of panels in different production lines and combine two or moreproduction lines together in the above-described step of arranging rowsnext to each other and wrapping a plastic film around the at least tworows. In other words, one packing machine forming modules as well as onepalletizer to form the final package can be used for two or moreparallel production lines which largely reduce the investment for thepackaging of the modules and the forming of the final package.

Preferred embodiments of the invention follow from the other claims.

According to a preferred embodiment of the invention, the packagefurther comprises means for dividing the modules into sub-units with thesub-units consisting of one row of rolls or packages of panels,respectively. By dividing the modules into sub-units, such sub-unitsbecome easier to handle. For persons on the construction site, the easyoption is given either to transport the modules or, where spacerequirements should make this disadvantageous, to subdivide a moduleinto sub-units and to handle these smaller units only.

In this respect, it is preferred that the means for dividing the modulesis a running chord around the center line of the plastic film running incircumferential direction around the wrapping of the modules, therunning chord preferably being arranged in an undulating way in sectionsinside and outside the wrapping. This specific type of a means fordividing the modules into sub-units is advantageous in that it stillmaintains a relatively waterproof wrapping around the modules andminimizes the undesired ingress of water and moisture.

According to an alternative embodiment of the invention, the means fordividing the modules into sub-units is a perforation in the wrappingwhich is arranged in a circumferential direction around the modules. Aperforation is the easiest and most cost-effective way to provide such adividing line. No matter how the dividing line is formed, it ispreferably covered by a waterproof tape so that no water can penetratethe dividing line.

According to an alternative embodiment of the invention, the individualmodules of the package are completely sealed by the wrapping of plasticfilm. The term “completely sealed” means that the wrapping around themodules provides a waterproof enclosure so that the package as well asthe individual modules are not subject to any damages because of a highwater absorption which can be detrimental to the quality of the fibresbecause of traces of undesired substances in the water. Alternatively,the individual rolls or the individual packages of panels are completelysealed.

According to preferred embodiment of the invention, the package has anoverall height between 2.3 m and 2.5 m and more particularly of about2.4 m. Such an overall height makes it possible to store a hightransport volume in conventional trucks or train wagons.

Preferably, the support surface of the package is a pallet, especially astandard pallet with a standing area of 1.2×1.2 m. Usually, the size ofthe pallets is between 1.2×1.5 m to 1.2×1.45 m. Especially standardpallets with a standing area of 1.2×1.2 m are used. The use of astandard pallet is advantageous because many transport means aredimensioned such that their transport volume is adapted to receive amaximum number of goods stored on standard pallets of this given size.

According to a preferred embodiment of the invention, the individualmodules have at least one handle which helps to transport the modules toand within the construction site.

Such handles are preferably formed by the same plastic material as thewrapping around the modules.

The modules can have either one or two different types of handles. Afirst type of handle is placed in the middle of the module and can beused to carry the whole module with a forklift or crane at theconstruction site. This handle can be used e.g. to lift the module to afloor of a house. In order to carry a module which can weigh up to 80kg, such a single handle is not suitable. For this purpose additionalhandles, e.g. four handles, can be placed at the sides of the modules sothat they can be used to carry the whole module by four workers.Alternatively, the modules can be divided into sub-modules which can becarried by two persons.

According to a preferred embodiment of the invention, the mineral woolproduct of the package consists of rolls, wherein each row consists ofthree or four rolls and two layers of rows are arranged within onemodule. In other words, each module of the package consists of two rowsof compressed mineral wool rolls. Since the two rows are arranged on topof each other the rolls resemble upright standing circular cylinderswhich are standing on top of each other within one module.

The rows of mineral wool are pre-compressed when forming the rolls outof a web of mineral wool and the individual rolls can be packed in aplastic wrapping forming a skirt around the rolls or a type of bag inorder to keep the individual rolls in the compressed state. Forcompressing the rolls, a device as described in EP 0 220 980 B1 can beused.

Preferably, the mineral wool product has a thickness of between 60 mmand 240 mm and is compressed within each roll such that the thickness ofthe product is considerably reduced, preferably by a factor rangingbetween 1 and 8 and most preferably between 3.5 and 5.5.

According to a preferred embodiment, the mineral wool product of apackage has a high spring back elasticity to be clamped between supportelements like rafters of a roof construction, which mineral wool productis called a “wedging felt”.

The process to manufacture an inventive package is characterized in thatthe modules are formed by arranging at least two rows of rolls orpackages of panels next to each other such that the rolls are broughttogether to make them touch one another at one of their front surfaces.Thereafter, a plastic film is wrapped around the at least two rows ofrolls or panels. In other words, when forming the modules, the rolls orpackages of panels are arranged such as to form parallel rows.

According to a preferred embodiment of the inventive process, themodules are made up by two rows and the rows are produced on differentproduction lines and combined together in the step of arranging the tworows next to each other. This specific, preferred embodiment of theprocess makes it possible to produce the rolls or packages of panels onparallel production lines, and combining together the rolls or packagesof panels produced when forming the modules and packaging the modules toform the final package. By using this specific process, differentadvantages can be achieved. The device for packaging the modules havingdouble capacity as compared to the prior art can simultaneously packagethe products which are produced in two parallel production lines. Thesame applies for the palletizer forming the final package which also hasa double capacity because it is no longer necessary to stack modules ontop of each other before finally combining the modules to the inventivepackage.

The last production step of the so-called palletizer is preferablycarried out by putting a plurality of modules onto a pallet and fixingthe modules on the pallet, preferably by wrapping a further plastic filmaround the package. Such palletizer can be made more simple because nohigh requirements have to be met as regards the exact positioning ofdifferent modules in top of each other. The inventive method leads tomodules in which the rows of rolls or packages of panels are alreadyexactly aligned and good aesthetics of the final package can beachieved.

A further advantage of commonly using one packaging machine formingmodules and one palletizer for two production lines resides in areduction of space required on the production site and a reduction ininvestment costs.

BRIEF DESCRIPTION OF THE DRAWINGS

In the following, the invention will be discussed by way of one specificembodiment, in which

FIG. 1 schematically shows the process of forming the inventive packagestarting from rows of mineral wool;

FIG. 2 schematically shows an inventive module made up of mineral woolpanels;

FIG. 3 shows an embodiment of a module made up of mineral wool rolls;and

FIGS. 4 and 5 show schematically the dividing lines of modules withchords.

DESCRIPTION OF A PREFERRED EMBODIMENT

In the following, specific embodiments of the invention will bedescribed in more detail. The first embodiment as shown in FIG. 1relates to rolls of mineral wool. However, it should be understood thatthe same basic principles also apply to the formation of a package madeup of packages of panels of insulation material.

FIG. 1 gives one specific example of a package 10 and the way it isproduced. The example package 10 in FIG. 1 consists of 24 rolls ofinsulation material, the thickness of the insulation material being in arange between 60 mm and 240 mm. The individual rolls may be producedwith a standard length L, which preferably is 1200 mm. The individualrolls are pre-compressed which means that, during the winding up of eachroll, the above-mentioned thickness of the insulation material between60 mm and 240 mm is considerably reduced. The reduction of the thicknessis selected in accordance with the specific structure of the insulationmaterial because the fibre structure of the insulation material must notbe destroyed so that the insulation material springs back to essentiallythe initial thickness after having been unwound from the roll. Thedegree of compression corresponding to the volume reduction of the woundup material is between 1 and 8 and preferably between 3.5 and 5.5.

After having compressed the web when coiling the individual rolls, carehas to be taken to maintain the desired compression and to avoid theelastic return of the material into the uncompressed condition. To thisend, a suitable wrapping is used which can either be a skirt around thecircumferential surface of the rolls, a bag also closing one frontsurface of the cylindrical roll or even a package closing thecircumferential surface and both front surfaces of the roll. Thepackaging around the individual rolls can be best made by a plastic filmwrapping of heat sealable plastic material which preferably hasadditional heat-shrinking behaviour. Preferentially, the individualrolls or the individual packages of panels are completely sealed. Asuitable material for the plastic film wrapping as well as for the otherwrappings described below to be used for the modules and the packageitself are PVC or PE.

As can be seen in FIG. 1, two rolls 1 a and 2 a are brought togethersuch that they touch one another at one of their front surfaces,respectively. The two rolls 1 a, 2 a can either be produced sequentiallyon one production line or can be produced simultaneously at two or moredifferent production lines (not shown) both producing and packagingindividual rolls of insulation materials which are brought to thepackaging device as shown in FIG. 1.

FIG. 1 only schematically depicts the important process steps withoutgiving a detailed description of the devices used because devices forcoiling rolls in a compressed state, devices for packaging rolls,devices for packaging compressed modules and so-called palletizers toput modules onto a pallet and packaging the resulting package are knownin the art.

Several pairs of rolls 1 a to 1 d and 2 a to 2 d are combined togethersuch that the individual pairs of rolls 1 a, 2 a, 1 b, 2 b, 1 c, 2 c, 1d, 2 d are not only placed such that front sides abut each other butalso arranged in a side-to-side configuration as shown in FIG. 1. In thespecific example, eight rolls of insulating material are combined insuch a way as shown in step A in FIG. 1.

In the subsequent step B, the rolls are packaged to modules. To thisend, a plastic film wrapping 3 is placed around the group of eightrolls. This packing step can also be carried out using compression asdisclosed in EP 0 220 980 B1. The compression of the rolls leads to areduction of the width W of the modules which can be seen from thedeformed and compressed shape of the front sides of the individualrolls.

In step C it can be seen that the two overlapping ends of the plasticfilm wrapping 3 are welded or bonded onto each other to form a seam 4.

After having been arranged in step A and packed in a wrapping of plasticfilm 3 in steps B and C, a module 6 has been formed which isschematically shown in step D. Each module consists of at least two rowsof coiled rolls with, in the specific example as shown in FIG. 1, twosuch rolls being arranged next to each other in a longitudinal directionof the module.

In the subsequent step E, a plurality of modules 6 a, 6 b, 6 c arestacked such that the arrangement of the individual rolls extends in athird dimension. In a subsequent step F, the plurality of modules 6 a, 6b, 6 c as shown in step E is brought in an upright position, i.e. withthe front surfaces of one layer of rolls standing on a pallet 8. In afinal step, the package 10 as shown in FIG. 1 is additionally surroundedby a plastic film wrapping which can also include the pallet as part ofthe packaging so that, when lifting up the pallet, the stacked moduleswithin their wrapping do not fall off the pallet.

The individual modules within each pallet can be separately handled oncethe wrapping around the package 10 has been removed. In order to makeeasier the handling of the individual modules, a handle 12 can beprovided which, for sake of simplicity, was arbitrarily placed in theschematic drawing of FIG. 3. The handle 12 can likewise be arranged atone of the short sides of the module. The handle 12 preferably consistsof the same material as the plastic film wrapping in order to simplifythe recycling of the wrapping material. The handle 12 serves to carry awhole module with a forklift or crane at the construction site. It canbe used to lift up the whole module to a certain floor or level within aconstruction site. In view of the fact that a big module can have aconsiderable weight up to e.g. 80 kg, handle 12 should be provided witha sufficient tear-off strength so that the whole module can be safelylifted up by handle 12.

In order to further simplify the handling of the individual moduleshaving a length 2L of 2.4 m in the example case of FIG. 1, the wrappingaround the modules can be provided with a suitable means to separate amodule 6 into the individual layers of rolls which is, in the examplecases of FIGS. 2 and 3, a row of rolls or packages of panels. Suchseparated unit is no longer a module of the overall package but is stillheld together by the outer wrapping such that it can be transportedwithin the construction side without having to hold together allindividual rolls or packages of panels of a row 13. The means fordividing the modules into layers can be a perforation or can be acircumferentially running chord in the position of the plastic filmsurrounding the modules in a position where the individual rows abuteach other. The running chord can run in undulating sections alternatelyinside and outside the plastic film as can be best seen from theschematic representation in FIG. 4 which shows a chord 14 whichalternately runs inside the wrapping 3 and outside the wrapping 3. Thesections of the chord 14 inside the wrapping 3 are sections 14 a whereasthe sections of the chord 14 outside the wrapping 3 are sections 14 b.

A sealing tape 15 can be placed on top of the chord 14 along dividingline to prevent water and moisture to enter the module through openingsformed along the dividing line. Such a sealing tape is schematicallyshown in FIG. 5 and could be partially or fully self-adhesive on thebottom side.

The module as shown in FIG. 3 is further provided with additionalhandles 11 situated at the short sides at the modules. In the examplecases shown in FIG. 3, these are four handles 11 which can either beused to carry the whole module by four persons or, after the module hasbeen divided into sub-modules, to carry each sub-modules by two persons.

FIG. 2 shows a module which, different to the module as shown in FIG. 1is made up of compressed mineral wool panels 20. Several such panels arestacked and the resulting pile of stacked panels is wrapped in a plasticfoil in order to obtain packages 22. In the example as shown in FIG. 2,four such packages can be seen in a first row and are referenced to byreference numerals 22 a, 22 b, 22 c and 22 d. On the other side of themodule, packages 22 e, 22 f, 22 g and 22 h of a second row areindicated. In the example case as shown in FIG. 2, four such packagesform a row 13. Within the module, at least two such rows 13 are placedon top of each other and after a compression in the longitudinaldirection of the rows 13, the module 6 as shown in FIG. 2 is packaged ina plastic film wrapping.

In the embodiments according the FIGS. 2 and 3, the modules are shownsuch that the front surfaces 7 of the modules 6 are not enclosed by theplastic film wrapping. However, when using a heat shrinking plasticmaterial for the wrapping, it can be sized such that the length of theplastic film wrapping is slightly larger than the overall length 2L ofthe modules so that under the application of heat, the excess portionsat both front ends 7 of the modules close onto the front ends which atleast partially closes the front ends of the modules as well.

According to an alternative embodiment, the module can be completelysealed with a plastic film. In that case, the additional plastic film 9around the bulk package 10 is no longer necessary because the modulesthemselves have a sufficient resistance against the undesired ingress ofmoisture. In that case, the bulk package 10 can be held together bystrap retainers (e.g. made from plastic or metal) and also fixed ontothe pallet 8 by means of strap retainers only. This measure serves tosafe the overall amount of plastic film material used for the inventivepackage.

The package according to the invention not only shows better aestheticsbecause the rows 13 of rolls or panels can be accurately aligned withineach module. The package has the additional advantage that both thepacking machine forming the modules as well as the palletizer formingthe final package can be either operated in half cycles as compared tothe previously known machines or can be used to package the rolls orpanels produced on two or more parallel production lines because thecombination of plurality of rows within each product increases thecapacity by a factor which corresponds to the number of rows per module.

1. Package comprising a multitude of rolls or packages of panels ofmineral wool, wherein each roll or package of panels is held in acompressed state; a the plurality of rolls or packages of panels aregrouped into one module, respectively; a plurality of modules isarranged on a support surface of the package such that the modules arein an upright position with front surfaces of the rolls of one rowstanding on the support surface, and the modules are in a compressedstate and packed in a wrapping of plastic film; characterized in thateach module is formed by at least two rows of rolls or packages ofpanels, at least two of such rows are arranged on top of each other suchthat the rolls touch one another at one of their front surfaces; and themodules are arranged next to each other on the support surface and areheld together on the support surface.
 2. Package according to claim 1,characterized in that the individual modules of the package are sealedby a wrapping of plastic film.
 3. Package according to claim 2, furthercomprising means for dividing the modules into subunits along a dividingline, wherein the subunits comprise a row of rolls or packages ofpanels, respectively.
 4. Package according to claim 3, wherein the meansfor dividing the modules comprises a running chord in the plastic filmarranged in a circumferential direction around the wrapping of themodules, wherein the running chord is arranged in an undulating way insections inside and outside the wrapping.
 5. Package according to claim3, wherein the means for dividing the modules comprises a perforation inthe wrapping which is arranged in a circumferential direction around thewrapping of the modules.
 6. Package according to claim 3 characterizedin that the dividing line is covered with a self-adhesive, waterprooftape.
 7. Package according to claim 1, characterized in that the packagehas an overall height between 2.3 m and 2.5 m.
 8. Package according toclaim 1, characterized in that the support surface comprises a palletwith a standing area of about 1.2 m×1.2 m.
 9. Package according to claim1, characterized in that the modules have a handle arranged to lift upthe modules in a balanced manner.
 10. Package according to claim 1,further comprising a plurality of handles arranged to carry theindividual modules by at least two persons or the rows by at least oneperson.
 11. Package according to claim 1, wherein each row of themineral wool comprises rolls comprising three or four rolls and whereintwo layers of rows are arranged within one module.
 12. Package accordingto claim 1, wherein the mineral wool has a thickness between 60 mm and240 mm and is compressed within each roll such that its thickness isreduced by a factor of 1 to
 8. 13. Package according to claim 1, whereinthe mineral wool has a high spring back elasticity and is suitable to beclamped between rafters or beams.
 14. Package according to claim 1,wherein each row comprises three or four packages of panels and whereintwo layers of packages of panels are arranged within one module. 15.Packaged module for multitude of rolls or packages of panels of mineralwool, comprising: compressed rolls of mineral wool which areindividually packaged within a plastic film or compressed stacks ofpanels which are packed in a plastic film form a package of panels,wherein the rows or rolls or packages of panels are further compressedwithin the packaged module, characterized in that the packaged module isformed by at least two rows of rolls or packages of panels, at least twosuch rows are arranged on top of each other such that the rolls touchone another at one of their front surfaces, and are surrounded by afurther plastic film.
 16. Packaged module according to claim 15, whereinthe individual rolls or the individual packages of panels are completelysealed by the plastic film.
 17. Process to manufacture the packagedmodules of claim 15, characterized in that the modules are formed by (a)arranging at least two rows of rolls or packages of panels next to eachother such that the rolls or packages of panels are brought together tomake them touch one another at one of their front surfaces; (b)compressing the at least two rows of rolls or packages of panels beingarranged next to each other; and (c) wrapping a plastic film around theat least two rows.
 18. Process according to claim 17, characterized inthat the modules are made up of two rows and each of the two rows isproduced on a different production line and combined with the other rowin step (a).
 19. Process to manufacture a package according to claim 17,further comprising the steps of (d) putting a plurality of modules ontoa pallet; and (e) fixing the modules on the pallet by wrapping a furtherplastic film around the package.
 20. Process according to claim 17,characterized in that the packaged modules comprise rolls of insulationmaterial and the individual rolls are wound up in a compressed state andindividually packed in a plastic film wrapping.